Alloy



WUST MILIILIKEN, 01E LAWRENCE, NEW YORK, ASSIGNOR T0 FOSTER MILLIKEN, FULLERTON WEAVER AND JS M. REJPJPLIER, AS TRUSTEES.

ALLOY.

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1t 0 Drawing.

T 0 all whom. it may concern:

Be it known that ll, Fosrnn MILLIKEN, a citizen of the United States, and a resident of Lawrence, in the county of Nassau and State of New York, have invented a new and Improved Alloy, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved alloy capable of being rolled, drawn, forged or worked in other ways while being cold, to form rods, plates, sheets, wires, tubing and the like.

An alloy made from the following metals in substantially the following proportions, namely,

Per cent. Copper to 7 0 Zinc 19 to 24 Nickel 9 to 12 llron 1 to 2% Manganese copper 1 in the alloy and this trace forms an important factor in the physical structure of the alloy. The copper of the manganese copper associates with the copper of the alloy.

The alloy is adapted for cold rolling and working and has the additional advantage of being acid resisting. The manganese in the alloy tends to toughen the same.

Tests of the new alloy have produced the following results: When the metal is rolled and cold drawn to what is known as 10 numbers hard it develops an ultimate tensile strength of 134,500 pounds per square inch; drawn to 11 numbers hard it develops 143,000 pounds per square inch; and drawn to 12 numbers hard it develops a tensile Specification of Letters Patent. Pgatgntmjl Um, i11 yoga,

Application filed August 18, 1920. Serial No. 404,977.

strength of 163,200 pounds per square inch and a reduction in area (in this last case) of 17 per cent.

llt is understood that the tensile strength of the alloy ranges from 45,000 to 183,000 pounds per square inch as the hardness varies from dead soft to say 16 numbers hard, but the above-mentioned numbers are for the alloys most used in commerce.

The alloy is, as previously stated, acid resisting and the following acids, bases, salts and organic compounds are successfully resisted by the alloy:

Acids.

Citric. Oelic. Hydrofluoric. Sulfuric. Oxalic. I Sulfurous.

Bases.

Caustic soda. Caustic potash.

Salts.

Calcium chlorid. Calcium sulfate. Sodium phosphate.

Aluminum sulfate. Ammonium citrate. Ammonium sulfate.

Organic compounds.

Chloroform. Ether.

This alloy differs from the one described in the Letters Patent of the United States, No. 1,314,417, granted to me on August 26, 1919, in that it has a high percentage of copper, a low percentage of zinc, and but a trace of manganese.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

An alloy consisting of the following in- Acetone. Benzol.

gredients in substantially the following pro- 7 rosrna MiLLmnN. 

